(57) A system for supplying energy to an implantable medical device is provided. The system
comprises an internal charger arranged to be implanted in a patient's body, the internal
charger comprising at least one radio frequency identification (RFID) transmitter,
an external charger comprising at least one RFID receiver for issuing interrogating
signals and receiving transmitted RFID signals in response, a wireless feedback system
arranged to transmit feedback information from the internal charger to the external
charger, wherein the feedback information is sent in response to the interrogating
signal sent from the external charger, and an evaluation unit for evaluating identification
signals received from the at least one RFID transmitter, the evaluation unit arranged
to measure the time period between the time when an interrogating signal is issued
and the time when an identification is received from the at least one RFID transmitter,
the measured time period representing or being directly related to the geometrical
distance between the RFID receiver and the at least one RFID transmitter.
|
|
